A YOLO Girl (or just A Yolo) is a female who has taken the saying "You only live once" (YOLO) as an excuse to throw around their vagina and have sex with as many people as possible. They are usually down to do it anywhere, anytime and with anyone.
Some YOLO girls justify this lifestyle by saying they have been emotionally hurt by someone in their past.
Bro 1: I just fucked stacey last night in my car! I think she likes me.
Bro 2: Dont get attached to her, she's a Yolo girl.